Statistical wireless channel propagation characteristics in underground mines at 900MHz: A comparative analysis with indoor channels

Qaraqe, Khalid; Yarkan, Serhan; Guzelgoz, Sabih; Arslan, Hüseyin

doi:10.1016/j.adhoc.2011.01.015

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…Table 8 shows the PL exponents observed at 915/2400 MHz for the NSC and WSC. The PL exponents values are observed to be ranging from 1.01 to 2.06, and in accordance with similar results [11,[30][31][32] which could be attributed to the evidence of waveguide effects [30][31][32][33] due to architectural and structural dimensions, type of construction material and type of interiors of the indoor corridors.…”

Section: Narrow Straight Corridor Measurement Resultssupporting

confidence: 74%

RF PROPAGATION INVESTIGATIONS AT 915/2400 MHz IN INDOOR CORRIDOR ENVIRONMENTS FOR WIRELESS SENSOR COMMUNICATIONS

Rao¹,

Balachander²

2013

PIER B

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Abstract-Propagation of Radio Frequency (RF) waves in indoor corridors is very complex and diverse as the propagation effects in the indoor scenarios are those that change over fractions of wavelength. Therefore, understanding of RF propagation characteristics is vital for the design of air interface and estimation of propagation losses is very much needed especially for wireless networks such as randomly deplorable Wireless Sensor Communications. In this research work, short-range, near floor/ground RF propagation path loss measurements at low antenna heights of 2 cm and 50 cm from the floor were made in typical narrow and wide straight indoor corridors at 915/2400 MHz in a modern multi-storied building utilizing RF equipment. Comparisons between measured and simulated path loss values were made utilizing Matlab simulations of Ray-tracing technique, free space and ITU-R models. Mean path loss exponent values were deduced from the measured data. The research work reported in this paper is predominately geared towards characterizing radio link for Wireless Sensor Communications/Networks in typical indoor corridor environments.

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Section: Narrow Straight Corridor Measurement Resultssupporting

confidence: 74%

RF PROPAGATION INVESTIGATIONS AT 915/2400 MHz IN INDOOR CORRIDOR ENVIRONMENTS FOR WIRELESS SENSOR COMMUNICATIONS

Rao¹,

Balachander²

2013

PIER B

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“…14 Signal attenuation in water, plastic, and air. The model shown by equation (6) to determine the signal attenuation in the soil can be extended to the calculation of the signal attenuation in the water, plastic, and air, respectively. This is based on the observation from equation (6) that the transmission loss P s in the soil is governed by only three parameters: the attenuation constant a s , the phase shifting constant b s , and the transmission distance d s in the soil.…”

Section: Signal Attenuation In Transmission Mediamentioning

confidence: 99%

Channel modeling and testing of wireless transmission for underground in-pipe leak and material loss detection

Mekid

Hussain

2017

International Journal of Distributed Sensor Networks

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A systematic real-time methodology is adopted for leak detection in underground buried pipes. The wireless communication system is used to analyze the system performance based on the received power by monopole antenna deployed at the receiving side. Instrumentation designed for underground measurement and control such as leak and materials loss detection needs wireless communications to aboveground in both ways and in real-time mode. This constitutes one of the timely and challenging issues of battery-operated systems. The purpose of this work is to characterize the radio transmission between underground buried pipes and base station using multi-layer media including both theoretical and experimental approaches by utilizing various modulation schemes. The objective is to identify the range of operating communication frequencies having lower energy loss, lower resulting bit error rate, and the power needed to transfer packets designed to carry data through the media. This will support the on-device power management to secure large autonomy operations. Experimental tests have shown that the overall received energy was mixed with ambient energy if the latter is sent at the same frequency and that the optimum frequency range used to transmit energy was rather at low frequency range of 100-200 MHz.

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“…Early research on characterizing underground mine environments mainly focused on measurement-based empirical methods [9]. Recently, statistically channel models that have been widely used to characterize wireless channels on the surface were applied to study underground mine channels [5, 6, 10–13]. Channel properties such as delay spread, power delay profile, and coherent bandwidth have been discussed based on statistical channels [14, 15].…”

Section: Introductionmentioning

confidence: 99%

Time Domain and Frequency Domain Deterministic Channel Modeling for Tunnel/Mining Environments

Zhou¹,

Jacksha²,

Yan³

et al. 2017

PIER C

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Understanding wireless channels in complex mining environments is critical for designing optimized wireless systems operated in these environments. In this paper, we propose two physics-based, deterministic ultra-wideband (UWB) channel models for characterizing wireless channels in mining/tunnel environments — one in the time domain and the other in the frequency domain. For the time domain model, a general Channel Impulse Response (CIR) is derived and the result is expressed in the classic UWB tapped delay line model. The derived time domain channel model takes into account major propagation controlling factors including tunnel or entry dimensions, frequency, polarization, electrical properties of the four tunnel walls, and transmitter and receiver locations. For the frequency domain model, a complex channel transfer function is derived analytically. Based on the proposed physics-based deterministic channel models, channel parameters such as delay spread, multipath component number, and angular spread are analyzed. It is found that, despite the presence of heavy multipath, both channel delay spread and angular spread for tunnel environments are relatively smaller compared to that of typical indoor environments. The results and findings in this paper have application in the design and deployment of wireless systems in underground mining environments.†

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Statistical wireless channel propagation characteristics in underground mines at 900MHz: A comparative analysis with indoor channels

Cited by 19 publications

References 10 publications

RF PROPAGATION INVESTIGATIONS AT 915/2400 MHz IN INDOOR CORRIDOR ENVIRONMENTS FOR WIRELESS SENSOR COMMUNICATIONS

RF PROPAGATION INVESTIGATIONS AT 915/2400 MHz IN INDOOR CORRIDOR ENVIRONMENTS FOR WIRELESS SENSOR COMMUNICATIONS

Channel modeling and testing of wireless transmission for underground in-pipe leak and material loss detection

Time Domain and Frequency Domain Deterministic Channel Modeling for Tunnel/Mining Environments

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